Carbureter.



J..L.T.THUR0T. CARBURETER. APPLICATION FILED DEC-19.19l3.

Patented Nov. 2, 1915.

2 SHEETS-SHEET l- HA ii J. L. T. THUROT.

CARBURETER.

APPLICATION FILED DEC. 19. 1913.

2 SHEETS-SHEET 2- Patented Nov. 2, 1915.

JEAN Louis THOMAS TnUEor; or PARIS; FRANCE, nssIeNoE T0 socn'irn DESCARBURATEURS rnuno'r (THUno'r, MEYER & cm), 0F PARIS, FRANCE.

- CAIRBURETER.

asses.

Specification of Letters Patent.

Patented m. a, rats.

Application filed December 19, 1913. Serial No. 807,677.

THURo'r, a citizen of the Republic of France, and residentof Paris,France, have invented a new and useful Carburetor, which carbu:

reter is fully set forth inthe following speci- This invention relatesto a carburetor in which the manipulation of a handle operating a plugto open or close air inlet openings communicating with jets or sprayers,one of which is below the constant level of the liquid fuel and isconsequently flooded, enables the supplyof gaseous mixture to beregulated in proportion to the running of the engine.

The invention further relates to a construction of the carbureter inwhich, while the system of sprayers and the plug are retained, thearrangement and the method of securing the sprayers relatively to thecarbureter, have been modified for the purpose of simplification.

In order to make the following explanation as clear as possible, theaccompanying drawings show by way of example, a carbureter according tothis invention.

Figure 1 is a vertical section on line A A of Fig. 2, Fig. 2 is a planView, Fig. 3 is a vertical section on line B]B of Fig. 2.

The constant-level fuel tank a, (Figs. 1,

2 and 3), which, incidentally, presents no special features,communicates by means of a conduit 1 and a collector 2, with threebranches 3, 3' and 3 terminating in sprayers or jets 4, 4; and 4",occupying the centers of orifices 5, 5 and 5 in'the'casing Z) of thecarburetor. Owing to its 'low position' the sprayer 4 is flooded, theliquid fuel reaching its level in a cup 8. lhe casing b is provided witha main air passage 7 corresponding to the orifice 5', and with two otherair passages 8 and 9 corresponding respectively to the orifices 5 and 5"and opening into the main passage 7 behind the plug 10, the passage 8being constantly open. The plug 10 is formed with a central butterfly llwhich controls the main passage 7, and with an end passage 9 which isdesigned to establish communication between the saidpassage 7 and thepassage 9, as shown in Fig. 1. The plug 10 is operated by means of anexteriorly-located handle 12. The passage 9 is made in a bell l3surrounding the cup 6, and the position of the said bell can be modifiedby screwing or unscrewing it, so as to regulate the quantity of airadmitted. 1

For running at slow speed, the plug 10 is turned by'means of the handle,12 into the position shown in Fig. 3, in which the butterflyllcompletely closes the passage 7, and the port 9 does not coincide withthe passage 9. Under these conditions, the ga-seous mixture which isdrawn into the engine by the suction exerted through the passages 7 and8, is formed only'by the air passing through the restricted orifice 5and carbu-- lib reted on contact with the liquid fuel disder the suctionaction of the engine, passes.

under the bell l3 and between the walls of the said bell and those ofthe cup 6 in order to be carbureted in passing through the liquidoccupying said cup. For running at normal speed, the plug 10 is turnedso that the butterfly 11 uncovers the passage 7, and the sprayer tsupplies fuel so as to camera the air drawn through the maximum orifice5'.

j I claim-- 7 1. In a carbureter for internal-combustlon engines, thecombination, with a casing having a main air-supply passage,;and a pairof auxiliary air-supply passages located atopposite sides of andcommunicating with said main passage, one of said auxiliary passagesbeing constantly open, of aseries of three sprayers projecting into saidpassages; a constant-level fuel-supply tank in communication with saidsprayers, one of the sprayers being located below the level of the'said'pfnel; and a plug valve rotatably mounted in said casing and providedwith an end port controlling the other'auxiliary passage and with acentral butterfly controlling said main passage, the arrangement beingsuch that the first named auxiliary passage is are engines, thecombination, with a casing having a main air-supply passage, and a pairof auxiliary air supply passages located at opposite sides of andcommunicating with said main passage, one of said passages beingconstantly open, of means for spraying liquid fuel into said passagesfor admixture with the air admitted thereinto'; and a plug Valverotatably mounted in, said casing and provided Withan end port and witha-central butterfly controlling the other auxiliary passage and the mainpassage, respectively, the arrangement being such that thefirstnamed'auxiliary passage is open during running of the engine atslow speed, the 15 other auxiliary passage port opening for higherspeed, and the butterfly opening for normal speed.

In testimony whereof I have signed this specification in the presence oftwo sub- 20 scribing witnesses.

JEAN LOUIS THOMAS THUROT.

Witnesses:

EMILE LEDRET, HANSON C. CoxE.

